Combination-lock.



No. 644,8l3. Patented Mar. 6, |900.

G. W. WATSON &C.'BEAN.

coMBlNATmN Lock.y

(Application led Dec. 28, 1899.5

(No Model.)

i n n l 5 WlT N55E5 llwrrn 'rares GEORGE IV. VATSON AND CHARLES BEAN, OFPAIVTUOKET, RHODE ISLAND.

COMBINATION-LOCK.

SPECIFICATION forming part of Letters Patent No. 644,813, dated March 6,1900.

Application tiled December 28,1899x Serial No. 741,799. (Norinodela Toall whom t may concern:

Be it known that we, GEORGE W. WATSON and CHARLES BEAN, citizens of theUnited States, residing in Pawtucket, in the county of Providence andState of Rhode Island, have invented new and useful Improvements inCombination-Locks, of which the following is a specification.

This invention relates to combination-locks, particularly to the classadapted for drawers for desks, cabinets, dsc., although it may be usedfor trunks or chests and in other places when a simple, secure, andinexpensive combinationlock is desired.

The nature of the invention is fully described below and illustrated inthe accompanying drawings, in which* Y Figure l is a front view of adrawer in position with our improved lock applied thereto. Fig. 2 is avertical section taken on line 2, Fig. l. Fig. 3 is a rear elevation ofthe lock and a port-ion of the drawer. elevation of the rear diskremoved. Fig. 5 is a front elevation of the rear disk removed. Fig. 6 isa rear elevation of the front disk re-` moved. Fig. 7 is afrontelevation of the front disk removed. Fig. S is a perspective view indetail, showing the spindle and the parts thereon removed and separated.

Similar letters of reference indicate corresponding parts.

a represents an ordinary drawer bored at a', and Z) the case into whichit slides,l provided with the bolt b.

A represents a spindle screw-threaded at its outer end to receive theknurled knob o. This spindle is provided with an integral annularthickened portion A', preferably beveled inward from `its surface onthel opposite sides, as shown in Fig. 2. Between this thickened portionA and the knob c a square block B is placed, said block being bored inorder to receive the spindle, and its ends fitting against the knob ontheportion A. On the spindle, behind the portion'A", is a collar C,formed with a flange C', from which projects radially an engaging pin C.The front end of this collar tits into the bevel on the rear side of theportion A'. On the collar C, behind its flange, is a sleeve D, providedwith a locking projection D, recessed at D' as shown in Figs. 2 and 5.The portion A of Fig. 4 is a rear the spindle is provided with a radialengaging pin A". A screw d extends through a washer d into the rear endof the spindle, overlapping the sleeve D.

E represents the rear disk,provided with the forwardlyextendinghorizontal peripheral flange. E', the edge whereof is provided withnotches or convolutions, as indicated in Fig. 5. The edge of this diskis provided with a radial notch or recess e, extending through theiiange, and it .is formed centrally with a hole e, whereby it issupported on the flange l of the collar O, and next said hole it isprovided with a rearwardly-extending annular flange E", around which isa thickened annular portion E"', provided with a pair of pins g.V Theflange E overlaps the forward edge of the sleeve D and underlaps theforward projection of the lock D. In front of the disk E is a disk F,somewhat smaller in diameter than the disk E and formed with arearwardly-projecting annular peripheral iiange F, which extends insidethe flange E on the disk E. The front surface of the disk, near itsedge, is provided with notches or convolutions F, as indicated in Fig.7, and the disk is formed with a radial notch f, somewhat 'shallowerthan the notch e, extending through the flange E. The disk F is formedwith a central opening f', whereby it surrounds the thickened portion Aof the spindle, and a flange F eX` tends :forward around said opening,as shown in Figs. 2 and 7. The frontor inner surface of the disk E isprovided near its opening with the horizontal pin H, adapted to beengaged by the pin O on the collar C, and the rear or inner surface ,ofthe disk F is provided near its opening with the horizontal pin II,adapted to be engaged by the pin A" on the portion A of the spindle. Theinner side of the front of the drawer a is provided with a suitableplatel, to which is secured the box J, whose annular periphery .I isformed with the slot K, said slot extending for a short distance intothe back of the box. The rear side of the box is provided with asuitable opening, whereby it iits around the sleeve D, such portion ofthe box being slotted at K', Fig. 3,

to accommodate lthe lock D'. A light spring L lies between the disk Fand the plate I and` presses said disk normally rearward or inward. Adial P, suitablyinscribed, titsupon IOO Lft.

the block B and is adapted to rotate in the plate S.

In the drawings (see Figs. 2 and 3) the parts are represented asunlocked and the bolt b is free to pass through the notches e and f, sothat the drawer can be opened or closed at pleasure. To lock the drawer,simply turn the spindle by means of the knob c in either direction. Tounlock it, the dial must be rotated to the left until the pin C engagesthe pin H and rotates the disk C until its slot c is in line with thebolt and to the right until the pin A engages the pin H' on the disk Fand rotates said disk until its slot f is inline with the bolt and withthe slot e. In unlocking, when the rear disk is to be rotated thespindle must be pushed in so as to move the locking-bolt D' rearwardfrom between the pins g on the rear side of the dial E; but when thefront disk is to be rotated the spindle is drawn forward, as shown inFig. 2, so that while the front disk is being rotated the rearl diskwill be held stationary, being held by the bolt D between the pins g,and not be affected by the spindle. As soon as the slots in both disksare brought under the slots K the drawer can be unlocked.

To change the combination, turn the front,

disk until its slotf is coincident with the slot K, leaving the pins Hand A/l in cont-act. Then remove the knob c and rotate the dial untilthe desired letter registers with a mark on the plate S. Return the knobto its position. Then push the spindle to the length of its traverse inorder to withdraw the bolt D from between the pins g and turn the reardisk until its slot e is under the slot K, leaving the pins C and Hincontact. Then turn the dial until the desired letter is reached. Vhilethe knob is being replaced, the disks maybe prevented from rotation byinserting a fiat instrument through the slot K into the slots e and f.

-By reason of the notched or convoluted front edge of the flange on thedisk E and of the convoluted portion on the front surface of the disk Fnear its periphery tampering with the lock by means of a wire or otherinstrument is rendered difncult, as there are no smooth portions wherebythe openings may become apparent. The entire circumference being uneven,a person attempting to tamper with the lock cannot tell when he reachesthe slot. Should pressure be brought to bear by pulling the drawerforward, the bolt would 1., In a combination-lock, in combination, v

the spindle A formed with the annular thickened portion A provided withthe pin A, the

disk F provided with the flange F', notch f and pin H', said disk beingsupported bythe portion A'; the case formed with the slot K; the dial;and the block B on the spindle and in engagement with the dial,substantially as described.

2. In a combination-lock, in combination, the spindle A, A'; the collarC, C on said spindle and provided with the pin 0"; the disk E supportedon said collar and provided with the liange E', notch e and pin H; thedial; and the case formed with the slotK; substantially as set forth.

3. In a combination-lock, in combination, the spindle A, A; the collarC, C onsaid spindle and provided with the pin 0; the disk E supported onsaid collar and provided with the liange E, notch e, pin H and pins g;the sleeve D on the spindle and provided with the lock D adapted toextend between the pins g; the dial; and the case formed with the slotsK and K', substantially as described.

4. In a combination-lock, in combination, the spindle A, A; the collarC, C on the spindle next the thick portion A; the'sleeve D on thespindle next the collar and provided with the lock D; a knob on thefront end of the spindle; the block B on the spindle between the knoband the thick portion A'; the disk F provided with the notch f, mountedon the portion A' of the spindle and adapted to be engaged thereby; thedisk E provided with the notch e, mounted on the collar and adapted tobe engaged thereby; and thespring L between the front disk and the wallto which the lock is secured, substantially as set forth.

GEORGE I/V. WATSON. CHARLES BEAN.

Vitnesses:

LUCY E. WATSON, GEORGE A. WATSON.

IDO

